Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details)
employee in Thousands, $ in Millions
 1 Months Ended 12 Months Ended
Dec. 31, 2019
USD ($)
employee
country
Sep. 30, 2019
Aug. 31, 2019
Sep. 30, 2019
USD ($)
shares
Nov. 30, 2018
USD ($)
shares
Dec. 31, 2019
USD ($)
employee
country
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Sep. 16, 2019
Jan. 01, 2019
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                    
Number of countries in which entity operates (more than) | country 120         120        
Number of our employees | employee 68         68        
Payments for repurchase of common stock           $ 0 $ 387 $ 174    
Research and development expenses           687 700 $ 501    
Restricted cash and cash equivalents held in bank accounts $ 1,102         1,102 1,208      
Operating lease, liability 842         $ 842        
ASU 2016-02                    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                    
Right of use asset                   $ 844
Operating lease, liability                   $ 844
Minimum                    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                    
Performance obligations expected to be satisfied, expected timing           P10Y        
Maximum                    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                    
Performance obligations expected to be satisfied, expected timing           P20Y        
General Electric Company                    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                    
Restricted cash and cash equivalents held in bank accounts 142         $ 142 461      
Joint venture, GE aero-derivative gas turbine products and services | JV aero-derivative gas turbine products and services                    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                    
Related party transaction, joint venture ownership percentage   50.00%   50.00%         50.00%  
Related party amount, due to related party | GE                    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                    
Cash $ 162         $ 162 $ 747      
BHGE LLC | General Electric Company                    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                    
Approximate interest         50.40%          
Class A | BHGE LLC | General Electric Company                    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                    
Stock Repurchased and Retired During Period, Shares | shares       132,300,000 101,200,000          
Class B | BHGE LLC | General Electric Company                    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                    
Sale of stock, number of shares issued in transaction (in shares) | shares         65,000,000          
Payments for repurchase of common stock       $ 250 $ 1,500          
Approximate interest         62.50%          
Stock repurchased (in shares) | shares       11,865,211            
Class B | Baker Hughes Incorporated | General Electric Company                    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                    
Approximate interest 36.70% 36.80% 50.30%